Need to replace the lower control Arm. Is there a procedure available?

I list a lower ball joint available to purchase.
So you would have to disconnect the lower control arm from the spindle to replace the joint.

According to Autozone.com, you must replace the whole control arm. Here is their procedure:
NOTE do not begin the removal procedure unless a new strut-to-lower arm nut, a new ball joint pinch bolt/nut and a new lower arm-to-front subframe bolt/nut are available.

1. Remove or disconnect the following:
   NOTE
   Do not use a hammer to separate the ball joint from the front wheel hub and spindle.
   
   
   
   WheelsLower arm strut nut and dished washer. Discard them.
   
2. Place the steering wheel in the unlocked position.
   NOTE
   Do not allow the halfshaft to move outward. Over-extension of the halfshaft joint could result in separation of internal parts, causing failure of the halfshaft joint.
   
3. Remove or disconnect the following:
   NOTE
   Use extreme care to not damage the ball joint boot seal.
   
   
   
   Lower arm ball joint nut and pinch bolt. Discard them.Lower arm from the front wheel knuckle
   
   
   
   Remove and discard the lower arm-to-front subframe bolt and nutRemove the lower arm from the vehicleTo install:
   
   1. Install or connect the following:
      
      Lower arm strut into the lower arm rear strut bushingLower arm into the front sub-frame bracketNew lower arm-to-front subframe nut and bolt. While holding the lower arm horizontal, tighten to 85-97 ft. lbs. (115-132 Nm).Ball joint stud-to-wheel hub and spindle, making sure that the ball stud groove is properly positioned.New lower arm ball joint pinch bolt and nut. Tighten to 46-52 ft. lbs. 62-71 Nm).
   2. Clean the lower arm strut threads to remove dirt and contamination.
   3. Install the dished washer with the dished side away from the lower arm rear strut bushing.
   4. Install the front suspension lower arm strut-to-strut nut and tighten to 85-97 ft. lbs. (115-142 Nm).
   5. Install the wheels.
   6. Lower the vehicle.

If the lower ball joint is riveted to the lower control arm you will be way better off replacing the entire control arm. They are available at your local parts store and are not that much more.

jack up the vehicle. remove the wheel, remove the nut from the ball joint. remove the stabilizer link from the lower control arm. strike the knuckle where the ball joint goes through with a large hammer until the ball joint separates from the knuckle. Remove the horizontal mounting bolt, remove the vertical mounting bolt, remove the lower control arm.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

The lower ball joint original is riveted into the lower control arm. If you can get to the lower control arm with a drill then the rivets can be drilled out and the joint removed . I find it quicker to remove the lower arm and do the job in a vice on the bench. Replacement ball joints will come with grade 8 bolts ( auto engineering quality) and will simply bolt into place using the holes for the rivets. So the procedure will be to jack the vehicle and place securely on jack stands. remove the wheel, remove the ball joint nut and using a ball joint removing tool drive the ball joint taper out of the support arm ( strut) Remove the inner pivot bolt ( remember to note the position of the lock washer as it is encentric and alters the wheel alignment) put the arm in a vice and carry on.

the lower ball joint is pressed into the lower control arm. You will need a ball joint press to remove and install the ball joint. The other option is to replace the lower control arm.

Some parts store will have presses for loan. You will have to check around and see if any in your area have these. If you can't find one you could always pull the control arm and bring it to a shop or machine shop and have them swap the ball joint.

Its a pretty simple procedure.

1. remove the wheel
2. remove the pinch bolt that secures the knuckle to the ball joint.
3. separate the lower control arm from the knuckle.
4. remove snap ring from the ball joint (if it has one)
5. use a ball joint press to press out the old ball joint.
6. press in the new ball joint.

if you don't have a press than you can remove the lower control arm by following steps 1-3 above. then remove the bolt from the front bushing. Remove the stamped steel skid pan from the sub frame. Remove the rear lower control arm bushing mounting bolts.

If you have any questions I'll be happy to answer them.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

To perform the following procedure, the lower control arm must be removed from the vehicle. Refer to Removal And Installation for that procedure.

1. Using a screw driver or other suitable tool, pry the seal boot off of the ball joint assembly
2. Position receiving cup, Special Tool 6758 to support lower control arm when removing ball joint assembly. Install Remover, Special Tool 6919 on the top of the ball joint assembly.
3. Using the arbor press, press the ball joint assembly completely out of the lower control arm.

NOTE: When installing ball joint in lower control arm, position the ball joint in control arm so notch in ball joint stud is in the direction shown. This will ease assembly of the ball joint to the steering when installing pinch bolt.

1. By hand, position ball joint into ball joint bore of lower control arm. Be sure ball joint is not cocked in the bore of the control arm, this will cause the ball joint to bind when being pressed into control arm.

 

1. Position control arm with installed ball joint, in an arbor press with Receiving Cup, Special Tool 6758 supporting the lower control arm. Then center Installer, Special Tool 6908-4 on the bottom of the ball joint
2. Carefully align all pieces. Then press the ball joint into the lower control arm until it is completely seated against surface of lower control arm. The ball joint is correctly installed when there is no gap between the ball joint and the lower control arm. Do not apply excessive force against the ball joint or the lower control arm.
3. Install a NEW seal boot by hand as far as possible on the ball joint. Installation of the seal boot is to be with the shield positioned as shown.

CAUTION: Do not use an arbor press to install the sealing boot on the ball joint. Damage to the sealing boot will occur if excessive pressure is applied to the sealing boot when it is being installed.

1. Place Installer, Special Tool 6758 over seal boot and squarely align it with bottom edge of seal boot. Apply hand pressure to Special Tool 6758 until seal boot is pressed squarely against top surface of lower control arm.

CAUTION: A replacement ball joint is not pre-lubricated. Properly lubricate the replacement ball joint using Mopar Multi-Mile grease or an equivalent. Lubricate ball joint after seal boot is installed but prior to top of seal boot being pushed down below notch in ball joint stud. Air must vent out of the seal boot at notch when grease is pumped into ball joint, failure to do so will balloon and damage seal boot. Do not over grease the ball joint, this will prevent the seal boot from pushing down on the stud of the ball joint.

CAUTION: After the ball joint is properly greased, clip the end of the grease fleeing off below the hex. The ball joint seal boot is non-purgeable and further greasing is not required and can result in damage to the seal boot.

1. Reinstall lower control arm on vehicle.

You need the repair manual. You will need some
hefty tools. The procedure is not that difficult, but
a few components have to be disassembled or removed
to access the lower control arm. I'm not plugging Haynes,
but their manual has step by step instructions.

To replace the lower control are you need to unbolt it from the subframe, airmatic strut, sway bar link and from the lower ball joint. The lower ball joint is separate from the lower control arm. The ball joint actually gets pressed into the steering knuckle. Then the lower control arm sits on top of the ball joint and gets bolted down. The lower control arms list price are about $330 each and the ball joints are around $78 each for oem mercedes parts. The total labor for both to be replaced is somewhere between 6-8 flag hours. The thrust arms are also part of the front suspension and those arms are one piece that have a ball joint as part of the arm. The lower control arm usually doesn't need to be replaced unless its damaged since the control arm bushings are available separately and are around $73 each side for the kit.

It depends on exactly which ball joint of the 3 per side your changing, but here are the details.

COMPRESSION LOWER ARM & LATERAL LOWER ARM ASSEMBLIES
Removal
1. Loosen compression lower arm ball joint nut. Using steering linkage puller, separate ball joint and
knuckle. Remove nut, bolts and compression lower arm assembly. Remove dust cover.
2. Remove stay. Remove shock absorber lower mounting bolt. Loosen lateral lower arm ball
joint and knuckle nut. Using steering linkage puller, separate ball joint and knuckle. Remove nut, bolt and
lateral lower arm assembly. Remove dust cover.
Inspection
Using preload socket, ensure breakaway torque for compression lower arm ball joint is 4-22 INCH lbs. (0.5-2.5
N.m) for 2000 models. On 2001 models, breakaway torque is 22-54 INCH lbs. (2.5-6.1 N.m). Ensure
breakaway torque for compression lateral lower arm ball joint is 13 INCH lbs. (1.5 N.m). Check compression
lower arm, lateral lower arm, dust covers, and bushings for damage and wear.
Installation
To install, reverse removal procedure. Use NEW ball joint nuts. Lubricate lip and inside of dust cover with
multipurpose lubricant. Using installer, install dust cover. Check front wheel alignment.
UPPER ARM ASSEMBLY
Removal
Using steering linkage puller, loosen upper arm ball joint and knuckle nut. Remove self-locking nut. Remove upper arm and upper arm shaft assembly. Remove dust cover.
Inspection
Using preload socket, ensure breakaway torque for upper arm ball joint is 3-13 INCH lbs. (0.3-1.5 N.m).
Replace upper arm assembly when measured value exceeds specification. Check upper arm, dust cover, and
bushings for damage and wear.
Installation
1. To install, reverse removal procedure. Use NEW self-locking nuts. Lubricate lip and inside of dust cover
with multipurpose lubricant. Using Ball Joint Installer (MB990800), install dust cover.
2. Ensure upper arm shaft assembly is installed at indicated angle. Verify upper arm shaft
assembly installation. Check front wheel alignment.

Once you have the correct arm off and a replacement joint (if available, some are not serviceable and require the arm to be replaced) then you will need a press or a ball joint press to change the joint. Such as
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=38335

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=46389

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=66958

or http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=46967

UPPER CONTROL ARM:

Do not disassemble the upper arm. If the ball joint or bushings are faulty, or the upper arm is damaged, the entire upper arm must be replaced.

1. Raise and support the vehicle safely.
2. Remove the front wheels. Support the lower control arm assembly with a floor jack.
3. Separate the upper ball joint from the steering knuckle using a ball joint separator tool.
4. Remove the self-locking nuts from the upper arm anchor bolts. Remove the upper arm from the vehicle.

Do not disassemble the upper arm. If the ball joint or bushings are faulty, or the upper arm is damaged, the entire upper arm must be replaced.
To install:
Use new self-locking nuts when installing the upper arm and strut.

1. Install the upper control arm assembly into the strut tower.
2. Connect the upper ball joint.
3. Install the front wheels and lower the vehicle.
4. With all four of the vehicle's wheels on the ground, torque the upper control arm nuts to 47 ft. lbs. (65 Nm). Torque the castle nut to 32 ft. lbs. (44 Nm); then, only tighten it enough to install a new cotter pin.
5. Tighten the wheel nuts to 80 ft. lbs. (110 Nm).
6. Check and adjust the vehicle's front end alignment.

The bushings on the front lower control arms are replaceable on most models.
This procedure requires the use of a press and may be above the skill range of the average driveway enthusiast. It is recommended that this procedure be done by a qualified machine shop if you are not skilled in the proper use of a press.

1. Remove the lower control arm that is in need of new bushings.
   

It is recommended that both the left and right lower control arm bushings be replaced at the same time. The vehicles handling may become unstable if there are new bushings on one side of the car and worn ones on the other.

1. Set up the control arm in a press.
2. Using a impact socket of the correct length and size, press out the old bushing.
3. Install the new bushing by slowly using the press to push it into the control arm.
4. WARNINGExcessive force could cause the bushing to bend or tear so be careful.
5. Once the bushing is properly seated in the control arm, remove the arm from the press and install it on the vehicle.